htpc cooling

Hey, just made an account because you guys usually answer every question I have. I'm building a low profile build that would benefit greatly from watercooling rather than a SFF fan. Sticking point is that the only feasible way to fit a 240mm radiator would be to mount it horizontally on the side...

Hey guys. As per title, just wondering if its OK to have your aio pump mounted horizontally? So... If you were to look down at the ground, the aio logo would be facing up at you. As in this pic (on a g12) : https://ibb.co/kSpJRDD All I see is posts about having pump below rad and tubes...

Hey guys. What are your opinions on pcie riser cables? -anyone had performance/compatibility issues? -I have pcie4.0 mobo (x570-p) and will at some point get 4.0 nvme, can I disable pci-e 4.0 for the gpu slot ONLY? -any brands to avoid? Or are the cheap £15 ones ok? -are pcie gen 4.0 ones...

Hey guys, Just looking for some cooling suggestions as had my gaming HTPC overheat recently, which hasn't been a noticeable issue until Fallout 4, in which it shuts down after running my temps up to... -91c CPU -80c mainboard(!!) -51c HDD and 86c on the GTX 970...